Nickel cobalt manganese hydroxide and preparation method thereof
A nickel hydroxide cobalt, cobalt metal technology, applied in the direction of nickel oxide/nickel hydroxide, chemical instruments and methods, nickel compounds, etc., can solve the problem of high density of nickel hydroxide cobalt manganese materials, to achieve the effect of increasing the specific surface area
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[0020] As described in the background art, the nickel cobalt manganese hydroxide material prepared by the existing method has the problem of relatively high compactness. In order to solve the above technical problems, the application provides a method for preparing nickel-cobalt-manganese hydroxide, the preparation method comprising: using nickel metal salt, cobalt metal salt, manganese metal salt and water to prepare a mixed salt solution: mixing the mixed salt solution, Alkaline precipitation agent and complexing agent carry out first precipitation reaction, second precipitation reaction and the 3rd precipitation reaction successively, obtain nickel hydroxide cobalt manganese, wherein the 1st precipitation reaction and the 3rd precipitation reaction are in nitrogen and / or inert gas Under protection, the second precipitation reaction is carried out under aerobic conditions.
[0021] The reaction principle is as follows: the first stage: under the protection of nitrogen atmosp...
Embodiment 1
[0034] Prepare 2mol / L nickel-cobalt-manganese sulfate mixed solution, in which the molar ratio of Ni:Co:Mn is 8:1:1, and prepare 5mol / L sodium hydroxide solution and 5mol / L ammonia solution.
[0035]Add 7L of pure water to the reactor, pass it into the reactor at a nitrogen flow rate of 0.5L / min, turn on the stirring motor of the reactor, set the stirring speed to 500rpm, open the jacketed circulating water of the reactor, and control the temperature of the circulating water at 60 ℃, after passing nitrogen for 2 hours, turn on the sodium hydroxide solution feed pump, adjust the pH to 12.2, add 700mL of 5mol / L ammonia solution, and stir evenly. At the same time, turn on the feed pump of nickel sulfate, cobalt and manganese mixed salt, sodium hydroxide feed pump, and the flow rate of ammonia solution to ensure that the concentration of ammonia in the reaction slurry during sample preparation is 0.3mol / L, and the flow rate is 0.5L / min Under the protection of a nitrogen atmosphere...
Embodiment 2
[0039] Prepare 2mol / L nickel-cobalt-manganese sulfate mixed solution, in which the molar ratio of Ni:Co:Mn is 8:1:1, and prepare 5mol / L sodium hydroxide solution and 5mol / L ammonia solution.
[0040] Add 7L of pure water to the reactor, pass it into the reactor at a nitrogen flow rate of 0.5L / min, turn on the stirring motor of the reactor, set the stirring speed to 500rpm, open the jacketed circulating water of the reactor, and control the temperature of the circulating water at 60 ℃, after passing nitrogen for 2 hours, turn on the sodium hydroxide solution feed pump, adjust the pH to 12.2, add 700mL of 5mol / L ammonia solution, and stir evenly. At the same time, turn on the feed pump of nickel sulfate, cobalt and manganese mixed salt, sodium hydroxide feed pump, and the flow rate of ammonia solution to ensure that the concentration of ammonia in the reaction slurry during sample preparation is 0.3mol / L, and the flow rate is 0.5L / min Under the protection of a nitrogen atmospher...
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